I am super glad Apple did not buy Spotify and I pray it never does. The first thing that would happen is the app would get "dumbed down" to make it "easy to use" and we'd lose much of what we love about Spotify at this time.BUT Apple should look back and realize they missed BIG in not purchasing Spotify and instead purchasing (I can't even remember the name).
Another thing that most likely would happen is that the Search feature would end up being rubbish. For some reason, Apple just can't seem to make really great search in many of their apps (in my experience). In macOS Music.app for example, searching in iTunes (1) limits results to 99 per search for songs —so there is no way I can find artists, album, or song titles that don't show up in the first 99 results when sorted A>Z or Z>A; and (2) the album search view absolutely sucks —showing only album artwork blocks in seemingly random order and with no ability to either list or sort by any metadata. Argh. I could go on.
Anyway, 'nuf said. My point is, I pray Apple and Spotify continue to operate side by side, thus allowing us options for what we prefer to use.